简介：
LizBonninpresentsacont股票配资杭州雷曼期货roversialandprovocativeepisodeofHorizon,investigatinghownewscientificresearchisraisinghardquestionsaboutzoos-thefilmexploreshowandwhyzooskeepanimals,andwhethertheyneedtochangetokeepupwithmodernscienceorultimatelybeconsignedtohistory.Shouldzoosculltheiranimalstomanagepopulations?LiztravelstoCopenhagenZoo,whokilledagiraffeandfedittothe爱若灼心冷如水全文免费阅读全书lions,towitnesstheircullingprocessfirsthand.Theythinkitisanaturalpartofzookeepingthatisoftensweptunderthecarpet.Shouldsomeanimalsneverbekeptincaptivity?Inaworldexclusive,LizvisitsSeaWorldinFloridaandasksifcaptivitydroveoneoftheirorcastokillhistrainer.Butcouldzoosbetheanswertoconservingendangeredspecies?Lizexaminestheirrecord,fromhelpingbreedpandasforthewildtoeffortstosavetherhinos.Shemeet趣书网手机TXT免费下载soneofthelastsurvivingnorthernwhiterhinosanddiscoversthefutureofthisspeciesnowliesinamultimillion-dollarprogrammetoengineerthemfromstemcells.VeteranconservationscientistDrSarahBexelltellsLizthescienceofcaptivebreedingisgivinghumanityfalsehope.
